Fig. 1. (A) A sectional diagram of the locust head showing the relative position of the frontal ganglion (FG). CC, corpora cardiaca; HG, hypocerebral ganglion; CA, corpora allata; SOG, suboesophageal ganglion. (Bi, Bii) Schematic drawing of the FG, the nerves leaving it and the muscles they innervate (Bii shows an area more posterior to Bi, after Allum, 1973). RN, recurrent nerve; PPN, posterior pharyngeal nerve; MPN, median pharyngeal nerve; APN, anterior pharyngeal nerve; FC, frontal connective; I, II and III, first, second and third branch of the FC; 1 and 3, muscles of the labrum; 33 and 34, first and second anterior dilators of cibarium; 35, 36 and 37, first, second and third dorsal dilators of pharynx; 39 and 40, first and second lateral dilators of pharynx; 43 second ventral dilator of pharynx. (C) A frontal section through the center of a whole-mount Hematoxylin and Eosin-stained FG. The neuronal cell bodies are in the peripheral zone, surrounding the neuropil (marked by a dashed line). The coarse neuropil in the central core of the ganglion (marked by a dotted line) can be distinguished from the surrounding finer neuropil. The RN and one of each of the paired nerves are visible and marked by arrows. Scale bar, 50 mm.

Return to article